LTC1290BCSW#TRPBF Linear Technology, LTC1290BCSW#TRPBF Datasheet - Page 5

• Manufacturer Part Number: LTC1290BCSW#TRPBF
• Description: IC DATA ACQ SYS 12BIT 20-SOIC
• Manufacturer: Linear Technology
• Type: Data Acquisition System (DAS), ADCr

Specifications of LTC1290BCSW#TRPBF

• Resolution (bits): 12 b
• Sampling Rate (per Second): 50k
• Data Interface: Serial, Parallel
• Voltage Supply Source: Dual ±
• Voltage - Supply: ±5V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SYMBOL
V
V
I
I
V
V
I
I
I
I
I
I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to ground with DGND, AGND
and REF
Note 3: V
– 5V for bipolar mode, ACLK = 4.0MHz unless otherwise specified.
Note 4: These specs apply for both unipolar and bipolar modes. In bipolar
mode, one LSB is equal to the bipolar input span (2V
For example, when V
Note 5: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 6: Recommended operating conditions.
Note 7: Two on-chip diodes are tied to each reference and analog input
which will conduct for reference or analog input voltages one diode drop
below V
DIGITAL A D
apply over the full operating temperature range, otherwise specifications are at T
IH
IL
OZ
SOURCE
SINK
CC
REF
–
IH
IL
OH
OL
–
–
CC
or one diode drop above V
wired together (unless otherwise noted).
= 5V, V
PARAMETER
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Output Voltage
Low Level Output Voltage
High-Z Output Leakage
Output Source Current
Output Sink Current
Positive Supply Current
Reference Current
Negative Supply Current
REF +
REF
U
= 5V, 1LSB (bipolar) = 2(5V)/4096 = 2.44mV.
= 5V, V
REF –
DC
CC
= 0V, V
. Be careful during testing at low
ELECTRICAL C
–
= 0V for unipolar mode and
REF
) divided by 4096.
CONDITIONS
V
V
V
V
V
V
V
V
V
V
CS High
CS High
Power Shutdown LTC1290DC, LTC1290BI
ACLK Off
V
CS High
CC
CC
IN
IN
CC
CC
OUT
OUT
OUT
OUT
REF
= V
= 0V
= 5.25V
= 4.75V
= 4.75V
= 4.75V
= 5V
= V
= 0V, CS High
= 0V
= V
CC
CC
CC
HARA TER STICS
, CS High
I
I
I
LTC1290BC, LTC1290CC
LTC1290CI, LTC1290DI
LTC1290BM, LTC1290CM
LTC1290DM
O
O
O
= 10µA
= 360µA
= 1.6mA
V
this input diode to conduct, especially at elevated temperatures and cause
errors for inputs near full scale. This spec allows 50mV forward bias of
either diode. This means that as long as the reference or analog input does
not exceed the supply voltage by more than 50mV, the output code will be
correct. To achieve an absolute 0V to 5V input voltage range will therefore
require a minimum supply voltage of 4.950V over initial tolerance,
temperature variations and loading.
Note 8: Channel leakage current is measured after the channel selection.
Note 9: To minimize errors caused by noise at the chip select input, the
internal circuitry waits for two ACLK falling edge after a chip select falling
edge is detected before responding to control input signals. Therefore, no
attempt should be made to clock an address in or data out until the
minimum chip select setup time has elapsed.
Note 10: Increased leakage currents at elevated temperatures cause the
S/H to droop, therefore it's recommended that f
f
ACLK
CC
C
(OBSOLETE)
levels (4.5V), as high level reference or analog inputs (5V) can cause
≥ 15kHz at 25°C.
I
A
= 25°C. (Note 3)
●
●
●
●
●
●
●
●
●
●
●
●
●
The
LTC1290B/LTC1290C/LTC1290D
●
denotes the specifications which
MIN
2.0
2.4
TYP
–20
4.7
4.0
20
10
6
5
5
1
ACLK
≥ 125kHz at 85°C and
MAX
– 2.5
0.8
2.5
0.4
– 3
12
10
15
50
50
LTC1290
3
UNITS
1290fe
5
mA
mA
mA
µA
µA
µA
µA
µA
µA
µA
µA
V
V
V
V
V